In Mass Effect 1 you could change class for a second playthrough, but you'd lose all XP.
Can I change my class in Mass Effect 3? When can I change it and what happens to my previous progress/level?
I don't mean changing class when importing a ME2 character, I mean after choosing a class in Mass Effect 3. Is there any option when completing the game that allows me to switch class?
Your class is set once you pick one on a new import/creation for ME3. Unfortunately, your class is retained when you start a new game+ so you cannot change it. Bonus powers, however, are retained by profile so you can pick a different bonus power.
You can change your class when importing a Mass Effect 2 save, before the tutorial.
You keep your level, but (understandably) you will start out with all your skill points unassigned.
